2015 Sierra 1500

Following its redesign last year, the 2015 GMC Sierra 1500 has a variety of updates. As in other GM models, the newest OnStar system debuts, complete with 4G LTE WiFi connectivity. A spray-on bed liner is now available, and HD radio has been removed from all Sierras. A new eight-speed transmission is now standard on trucks equipped with the 6.2L EcoTec3 V8.